docs: def wnsumd(window):
      """
      Summarize the contents of a double precision window.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/wnsumd_c.html
  
      :param window: Window to be summarized. 
      :type window: spiceypy.utils.support_types.SpiceCell
      :return:
              Total measure of intervals in window,
              Average measure, Standard deviation,
              Location of shortest interval,
              Location of longest interval.
      :rtype: tuple
      """
      assert isinstance(window, stypes.SpiceCell)
      assert window.dtype == 1
      meas = ctypes.c_double()
      avg = ctypes.c_double()
      stddev = ctypes.c_double()
      shortest = ctypes.c_int()
      longest = ctypes.c_int()
      libspice.wnsumd_c(ctypes.byref(window), ctypes.byref(meas),
                        ctypes.byref(avg), ctypes.byref(stddev),
                        ctypes.byref(shortest), ctypes.byref(longest))
      return meas.value, avg.value, stddev.value, shortest.value, longest.value